CN112213880B - Color conversion assembly, display panel and manufacturing method of color conversion assembly - Google Patents

Color conversion assembly, display panel and manufacturing method of color conversion assembly Download PDF

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Publication number
CN112213880B
CN112213880B CN201910624305.2A CN201910624305A CN112213880B CN 112213880 B CN112213880 B CN 112213880B CN 201910624305 A CN201910624305 A CN 201910624305A CN 112213880 B CN112213880 B CN 112213880B
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Prior art keywords
light
color conversion
layer
filter
conversion unit
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CN112213880A (en
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王岩
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Chengdu Vistar Optoelectronics Co Ltd
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Chengdu Vistar Optoelectronics Co Ltd
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Priority to CN201910624305.2A priority Critical patent/CN112213880B/en
Priority to PCT/CN2020/081770 priority patent/WO2021004097A1/en
Publication of CN112213880A publication Critical patent/CN112213880A/en
Priority to US17/323,193 priority patent/US20210273024A1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses

Abstract

The embodiment of the invention provides a color conversion assembly, a display panel and a manufacturing method of the color conversion assembly, wherein the color conversion assembly comprises the following components: the color conversion layer comprises an isolation structure, a plurality of accommodating spaces formed by enclosing the isolation structure, openings communicated with the accommodating spaces, and light conversion units arranged at least part of the openings in the accommodating spaces; and a Bragg filter layer including a curved filter corresponding to the light conversion unit, the curved filter being curved in a direction away from the light conversion unit. The curved filter is arranged corresponding to the light conversion unit, and light emitted by the light conversion unit is enabled to be emitted to the curved filter. The curved filter lens is formed by bending along the direction far away from the light conversion unit, so that the incident angle of light emitted by the light conversion unit when the light enters the curved filter lens tends to be consistent, the optical path of the light in the curved filter lens tends to be consistent, the filtering effect of the curved filter lens is improved, the light leakage is reduced, and light mixing is prevented.

Description

Color conversion assembly, display panel and manufacturing method of color conversion assembly
Technical Field
The invention relates to the technical field of display devices, in particular to a color conversion assembly, a display panel and a manufacturing method of the color conversion assembly.
Background
Flat Display panels, such as Liquid Crystal Display (LCD) panels, Organic Light Emitting Diode (OLED) panels, and Display panels using Light Emitting Diode (LED) devices, have advantages of high image quality, power saving, thin body, and wide application range, and are widely used in various consumer electronics products, such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
The display panel may implement a display supporting color patterns through various colorization schemes. In some embodiments, colorization is achieved by adding a color conversion layer. However, in the color conversion layer in the related art, problems such as color mixture and color shift are likely to occur.
Disclosure of Invention
The embodiment of the invention provides a color conversion assembly, a display panel and a manufacturing method of the color conversion assembly, and aims to solve the problem of color mixing caused by light leakage.
An embodiment of the present invention provides a color conversion module, including: the color conversion layer comprises an isolation structure, a plurality of accommodating spaces formed by enclosing the isolation structure, openings communicated with the accommodating spaces, and light conversion units arranged at least part of the openings in the accommodating spaces; and a Bragg filter layer including a curved filter corresponding to the light conversion unit, the curved filter being curved in a direction away from the light conversion unit.
According to an aspect of the invention, the light conversion module further includes a baffle disposed in the opening corresponding to the light conversion unit and connected to the isolation structure, and the baffle is disposed with a light exit hole through it, so that the emergent light passing through the light conversion unit exits through the light exit hole.
According to an aspect of the present invention, a projection of the curved filter in a thickness direction of the bragg filter layer is arc-shaped;
preferably, the curved filter is at least one part of a hemisphere, and the sphere center of the hemisphere where the curved filter is located is in the light exit hole.
According to one aspect of the invention, the curved filter is hemispherical;
according to one aspect of the present invention, the curved filter is a portion of a hemisphere, and the curved filter and the baffle are spaced apart along a thickness direction of the color conversion assembly;
preferably, a light blocking structure is arranged between two adjacent light emitting holes, and the light blocking structure is connected between the filter layer and the baffle or the isolation structure.
According to one aspect of the invention, the isolation structure comprises a light reflecting metal material and/or a light absorbing material, or the outer surface of the isolation structure is provided with a light reflecting metal layer and/or a light resistance layer;
and/or the bezel comprises a light reflecting metallic material and/or a light absorbing material.
Another aspect of an embodiment of the present invention provides a display panel, including: the driving back plate is distributed with a plurality of light sources; in the color conversion assembly, the light source is arranged corresponding to the accommodating space.
According to one aspect of the invention, the color conversion assembly further comprises a baffle plate, the baffle plate is arranged in the opening corresponding to the light conversion unit and connected to the isolation structure, and the baffle plate is provided with a light outlet hole in a penetrating manner so that emergent light passing through the light conversion unit is emitted out through the light outlet hole;
the light source and the light emitting holes are arranged at intervals along the thickness direction of the display panel, and the projection of the light source on the driving back plate and the projection of the light emitting holes on the driving back plate are at least partially overlapped along the thickness direction.
Another aspect of the embodiments of the present invention provides a method for manufacturing a color conversion module, including:
providing a substrate, forming a model layer on the substrate, and forming a Bragg mirror filter layer in the model layer, wherein the filter layer comprises a plurality of curved surface filter lenses which are formed in a concave manner along the direction close to the substrate;
forming a first planarization layer on the molding layer;
forming an isolation structure on the first leveling layer, wherein the isolation structure encloses to form a plurality of accommodating spaces;
a light conversion unit is formed within at least a portion of the receiving space to form a color conversion assembly.
According to an aspect of the present invention, before forming the light conversion unit in at least a part of the accommodating space, further comprises:
forming a baffle in at least part of the accommodating space, wherein the baffle is provided with a light outlet hole which is arranged in a penetrating way;
a light conversion unit is formed on the baffle to form a color conversion assembly.
In the invention, the color conversion component comprises a color conversion layer and a Bragg filter layer, wherein the color conversion layer comprises an isolation structure and a light conversion unit, and the isolation structure encloses to form an accommodating space. The curved filter is arranged corresponding to the light conversion unit, and light emitted by the light conversion unit is enabled to be emitted to the curved filter. The curved filter is formed by bending along the direction far away from the light conversion unit, and the incident angles of the light emitted by the light conversion unit when entering the curved filter tend to be consistent, for example, tend to 90 degrees, so that the optical paths of the light in the curved filter tend to be consistent, the filtering effect of the curved filter is improved, the light leakage is reduced, and the light mixing is prevented.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
FIG. 1 is a schematic structural diagram of a color conversion module according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a color conversion module according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a color conversion module according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a color conversion assembly according to yet another embodiment of the present invention;
FIG. 5 is a schematic diagram of a color conversion assembly according to yet another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 7 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 8a to 8i are process diagrams of a display panel according to an embodiment of the invention.
Description of reference numerals:
100. driving the back plate; 110. a light source; 120. a light shielding structure;
200. a color conversion layer;
210. an isolation structure; 211. an accommodating space; 220. a light conversion unit;
300. a baffle plate; 310. a light exit hole;
400. a filter layer;
410. a curved surface filter; 420. a leveling section;
500. a light blocking structure;
600. a leveling layer;
700. a molding layer; 710. a recess;
800. and (7) a cover plate.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For better understanding of the present invention, the color conversion assembly, the display panel and the method for manufacturing the color conversion assembly according to the embodiments of the present invention are described in detail below with reference to fig. 1 to 8 i.
Fig. 1 is a schematic structural diagram of a color conversion module according to an embodiment of the present invention, where the color conversion module includes: the color conversion layer 200 comprises an isolation structure 210, an accommodating space 211 formed by enclosing the isolation structure 210, an opening communicated with the accommodating space 211, and a light conversion unit 220 arranged at least part of the opening in the accommodating space 211; the bragg filter layer 400 includes a curved filter 410 corresponding to the light conversion unit 220, and the curved filter 410 is bent in a direction away from the light conversion unit 220.
In the present invention, the color conversion assembly includes a color conversion layer 200 and a bragg filter layer 400, the color conversion layer 200 includes an isolation structure 210 and a light conversion unit 220, and the isolation structure 210 encloses to form an accommodation space 211. The curved filter 410 is arranged corresponding to the light conversion unit 220, light emitted by the light conversion unit 220 is made to be directed to the curved filter 410, the curved filter 410 is formed by bending along a direction far away from the light conversion unit 220, and it can be ensured that incident angles of the light emitted by the light conversion unit 220 when the light is emitted into the curved filter 410 tend to be consistent, for example, tend to 90 degrees, so that light paths of the light in the curved filter 410 tend to be consistent, the filtering effect of the curved filter 410 is improved, light leakage is reduced, and light mixing is prevented.
The isolation structure 210 is made of multiple materials, preferably, the surface of the isolation structure 210 is coated with a reflective layer, such as a reflective metal material layer, so that the isolation structure 210 can reflect light, the isolation structure 210 can prevent the light in the two adjacent accommodating spaces 211 from mixing, and can reflect the light reaching the surface of the isolation structure 210, thereby improving the absorption conversion rate of the light conversion unit 220 to the light. Alternatively, the surface of the isolation structure 210 is coated with a light absorbing layer, such as a black light absorbing material layer, so that the isolation structure 210 can prevent the light in two adjacent accommodating spaces 211 from mixing.
In alternative embodiments, the isolation structures 210 may also be made of a metal light-reflecting material or a black light-absorbing material.
The shape of the isolation structures 210 can be arranged in various ways, for example, the surface of the isolation structures 210 facing the accommodating space 211 is perpendicular to the plane of the driving back plate 100. Or the surface of the isolation structure 210 facing the accommodating space 211 is a slope, when the isolation structure 210 is made of a light-reflecting material, the light-reflecting efficiency of the isolation structure 210 can be increased, and the absorption and conversion rate of the light conversion unit 220 can be further improved.
The light conversion unit 220 can be disposed in various ways, for example, when the color conversion assembly is applied to a display panel and the light source 110 of the display panel is a blue light source, the light conversion unit 220 includes a red conversion unit and a green conversion unit. When the light source 110 of the display panel is other color light, for example, UV light, the light conversion unit 220 includes a red conversion unit, a green conversion unit, and a blue conversion unit.
The light conversion unit 220 may be disposed in various ways, for example, the light conversion unit 220 includes a red or green Quantum Dot (QD), so that the light conversion unit 220 can emit light of a red or green color corresponding to the sub-pixel under the excitation of the light emitted from the light source 110.
The color conversion assembly is not limited to this, and in some alternative embodiments, the color conversion assembly further includes a baffle 300 disposed in the opening corresponding to the light conversion unit 220, the baffle 300 is connected to the isolation structure 210 to form a reflective space between the baffle 300 and an inner wall surface of the curved filter 410 facing the baffle 300, and the baffle 300 is disposed through the light exit hole 310, so that light emitted from the light source 110 exits from the light exit hole 310 through the light conversion unit 220.
In these alternative embodiments, when the color conversion assembly is applied to a display panel, the barrier 300, the isolation structure 210 and the driving backplane 100 of the display panel can enclose a relatively closed space. The light emitted by the light source 110 can be reflected multiple times in a relatively closed space and enter the light conversion unit 220, so that the absorption and conversion rate of the light by the light conversion unit 220 are increased, the light leakage is reduced, and the light mixing is prevented. The light is emitted from the light-emitting hole 310, the light-emitting area can be reduced, not only can the light mixing be further prevented, but also the incident angles formed by the light emitted from the light-emitting hole 310 to the curved filter 410 on the inner wall surface of the curved filter 410 tend to be consistent, so that the optical paths of the light in the curved filter 410 tend to be consistent, the filtering effect of the curved filter 410 is improved, and the light leakage of the light source 110 is reduced.
The baffle 300 may be disposed in various ways, for example, the baffle 300 is made of at least one of a light-reflecting metal material and a light-absorbing material. Preferably, the baffle 300 is made of a reflective material, such as a metal reflective layer, so that the baffle 300 can reflect light, and the light emitted by the light source 110 is reflected multiple times in the space 211, thereby improving the absorption and conversion rate of the light conversion unit 220 to the light source 110.
The shape and size of the light-emitting hole 310 on the baffle 300 are not limited, as long as the light-emitting hole 310 can reduce the light-emitting area, so that the light-emitting hole 310 can form point light emission relative to the curved filter 410.
The bragg filter layer 400 may be disposed in various ways, for example, the bragg filter layer 400 is formed by alternately laminating film layers having different refractive indexes, so that light in a specific wavelength band can be reflected back to the reflective space when passing through the optical filter layer 400, thereby achieving the purpose of filtering light. Preferably, the bragg filter layer 400 is formed by alternately laminating two kinds of film layers having different refractive indexes in order to reflect light of a specific wavelength band back to the reflective space when the light passes through the bragg filter layer 400. The film layer can be disposed in various ways, for example, the film layer can be formed by chemical vapor deposition. For example, the bragg filter layer 400 is formed by alternately growing transparent inorganic material layers with different refractive indexes, such as silicon dioxide SiO2, silicon nitride Si3N4, etc., by using a chemical vapor deposition method; or the bragg filter layer 400 is formed by alternately growing organic material layers with different refractive indexes, such as parylene layers, by using a chemical vapor deposition method. The film layer may also be made by a solution method, such as a polymethyl methacrylate (PMMA) film made by a solution method. When the color conversion device is applied to a display panel and the light source 110 of the display panel is a blue light source 110, the blue light can be reflected back to the reflective space when reaching the bragg filter layer 400.
The shape of the curved filter 410 is not limited herein, and preferably, the projection of the curved filter 410 in the thickness direction (Z direction shown in fig. 1) of the bragg filter layer 400 is arc-shaped, so as to further ensure that the incident angles of the light from the light outlet 310 to the inner wall surface of the curved filter 410 are consistent. The projection of the curved filter 410 in the thickness direction of the bragg filter layer 400 is: a projection of the curved filter 410 on a cross section of the filter layer 400 in the thickness direction. The projection of the curved filter 410 in the thickness direction of the bragg filter layer 400 is arc-shaped, that is, the curved filter 410 is arc-shaped on a cross section of the bragg filter layer 400 in the thickness direction.
It is further preferred that the curved filter 410 is at least a portion of a hemisphere, and the center of the hemisphere where the curved filter 410 is located is within the light exit hole 310. The distances from the light-emitting hole 310 to the inner wall surface are equal, so as to further ensure the incident angles of the light to be consistent, and the emergent light of the light-emitting hole 310 and the inner wall surface of the curved filter 410 are perpendicular to each other. Further ensuring the optical path of light in the curved filter 410 to be consistent, improving the filtering effect of the curved filter 410, and reducing the light leakage of the light source 110.
Where the curved filter 410 is hemispherical or at least a portion of a hemisphere, where the sphere is not mathematically geometrically exact, so long as the curved filter 410 approximates a hemisphere or a portion of a hemisphere within an error tolerance. The spherical center of the hemisphere where the curved filter 410 is located is within the light exit hole 310 means that the spherical center of the hemisphere where the flat curved filter 410 is located is within the light exit hole 310, or the spherical center of the hemisphere where the curved filter 410 is located is within the light exit hole 310 in the thickness direction of the baffle 300.
In other alternative embodiments, as shown in FIG. 2, the curved filter 410 has a hemispherical shape, and the spherical center of the curved filter 410 is within the light exit aperture 310. The curved filter 410 can not only completely cover the light-emitting holes 310, so that the light emitted from two adjacent light-emitting holes 310 will not mix, but also the distance from the light-emitting holes 310 to the inner wall surface of the curved filter 410 is equal, the incident angle of the light is equal, and the filtering capability of the curved filter 410 is further improved.
As shown in fig. 3 to 5, in further alternative embodiments, the curved filter 410 is a portion of a hemisphere, the curved filter 410 and the barrier 300 are disposed at intervals along a thickness direction of the color conversion assembly, a light blocking structure 500 is disposed between two adjacent light emitting holes 310, and the light blocking structure 500 is connected between the filter layer 400 and the barrier 300 or the isolation structure 210.
In these alternative embodiments, the curved filter 410 cannot completely cover the light exit holes 310, and therefore, the light blocking structure 500 is provided, and the light emitted from two adjacent light exit holes 310 can be prevented from mixing with each other by the light blocking structure 500.
The filter layer 400 is not limited to this configuration, and in some alternative embodiments, for example, as shown in fig. 3, two adjacent curved filters 410 intersect. Or in further alternative embodiments, as shown in fig. 4 and 5, the filter layer 400 further includes a flat portion 420 connecting two adjacent curved filters 410, and the light blocking structure 500 may be connected between the flat portion 420 and the barrier 300 or the isolation structure 210. As shown in fig. 4, a light blocking structure 500 may be disposed between two adjacent curved filters 410, and the light blocking structure 500 is located at the middle position of the two adjacent curved filters 410, such that the light blocking structure 500 is connected between the isolation structure 210 and the leveling portion 420. Alternatively, as shown in fig. 5, two light blocking structures 500 may be connected between two adjacent curved filters 410, the curved filters 410 and the leveling portion 420 form an intersection point, and the light blocking structure 500 is connected between the vicinity of the intersection point and the baffle 300 or the isolation structure 210, so as to further ensure that the optical paths between the light emitted from the light outlet 310 and the inner wall surface of the curved filter 410 are consistent.
In order to simplify the process of the color conversion assembly, the light blocking structure 500 may not be provided as shown in fig. 1, considering that when the filter layer 400 includes the curved filter 410, the light mixing of the adjacent two light exit holes 310 is very limited.
In order to form the curved filter 410 and ensure the flatness of the filter layer 400 near the surface of the color conversion layer 200, the color conversion assembly further comprises a molding layer 700 and a planarization layer 600, the molding layer 700 has a concave portion 710 with a shape matching the curved filter 410, a reflective material is deposited in the concave portion 710 to form the filter layer 400, and the planarization layer 600 is disposed on the side of the molding layer 700 near the color conversion layer 200, so that the planarization layer 600 can fill the gap of the curved filter 410 and ensure the flatness of the filter layer 400 near the surface of the color conversion layer 200. When the curved filter 410 is spherical and completely covers the light exit hole 310, the flattening layer 600 is only filled in the curved filter 410, and when the curved filter 410 and the color conversion layer 200 are spaced apart, the flattening layer 600 also fills the gap between the curved filter 410 and the color conversion layer 200. Further, a glass cover plate 800 is disposed on a side of the mold layer 700 away from the planarization layer 600 to form a package protection layer.
Referring to fig. 6, a display panel including the color conversion device according to a second embodiment of the present invention is also provided. Since the display panel of the embodiment of the invention includes the color conversion component, the display panel of the invention has the beneficial effects of the color conversion component, and the description is omitted here.
The Display panel of the present invention may be a Liquid Crystal Display (LCD) Display panel, an Organic Light Emitting Diode (OLED) Display panel, and a Display panel using a Light Emitting Diode (LED) device.
Optionally, the display panel further includes a driving back plate 100, and a plurality of light sources 110 are distributed on the driving back plate 100. The light source 110 is disposed corresponding to the accommodation space 211. In some embodiments, the driving back plate 100 has a plurality of light sources 110 distributed thereon.
Further, a light shielding structure 120 is further disposed on the driving back plate 100, the light shielding structure 120 encloses to form an accommodating cavity, and the light source 110 is disposed in the accommodating cavity. When the display panel includes the color conversion component of the driving back plate 100, the light shielding structure 120 and the isolation structure 210 are aligned and attached to form a relatively closed space, so as to further improve the light leakage prevention effect.
The light sources 110 may be arranged in various ways, and the light sources 110 may be light sources 110 of various colors, for example, the light sources 110 are white light sources 110, blue light sources 110, and the like.
The relative positions of the light source 110 and the light exit hole 310 are not limited, and preferably, the light source 110 and the light exit hole 310 are correspondingly arranged along the thickness direction (Z direction in fig. 6) of the display panel. Further preferably, in the thickness direction, the projection of the light source 110 on the driving back plate 100 and the projection of the light exit hole 310 on the driving back plate 100 are at least partially overlapped, so as to ensure that more light emitted by the light source 110 enters the light conversion unit 220, and improve the absorption conversion rate of the light conversion unit 220.
The third embodiment of the present invention further provides a display device, including the display panel. The display device in the embodiment of the present invention includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, a paper book, a television, a door lock, an intelligent fixed-line telephone, a console, and other devices having a display function. Since the display device of the present invention includes the display panel, the display device of the present embodiment has the beneficial effects of the display panel, and is not described herein again.
Referring to fig. 7, a fourth embodiment of the present invention further provides a method for manufacturing a display panel, including:
step S01: a backplane assembly is provided.
The back plate assembly includes a driving back plate 100, a plurality of light sources 110 distributed on the driving back plate 100, and a light shielding structure 120 surrounding the light sources 110.
Step S02: forming a color conversion assembly.
The color conversion assembly comprises a substrate, a Bragg filter layer 400 and a color conversion layer 200, wherein the Bragg filter layer 400 and the color conversion layer 200 are positioned on the substrate, the filter layer 400 comprises a plurality of curved filters 410, the curved filters 410 are concavely formed along the direction close to the substrate, the color conversion layer 200 comprises an isolation structure 210, a containing space 211 formed by enclosing the isolation structure 210, and a light conversion unit 220 in at least part of the containing space 211.
Step S03: and aligning and attaching the back plate assembly and the color conversion assembly to form the display panel.
The sequence of step S02 and step S01 is not limited, and the backplane assembly may be formed first or the color conversion assembly may be formed first, as long as the display panel can be formed by aligning and bonding the backplane assembly and the color conversion assembly.
There are various methods of forming the color conversion assembly, that is, there are various setting ways of the step S02, and in some alternative embodiments, the step S02 includes:
step S021: a substrate is provided, a mold layer is formed on the substrate, and a Bragg-mirror filter layer is formed in the mold layer, the filter layer including a plurality of curved filters formed to be recessed in a direction close to the substrate.
The molding layer 700 may be made of a plastic transparent material, such as photoresist, resin, polydimethylsiloxane, etc. The molding layer 700 may be formed by a mold nano-imprinting method.
Step S022: a first planarization layer is formed on the molding layer.
The first planarization layer can be made of transparent planarization layer materials, such as photoresist, packaging glue and the like, and can be manufactured and molded through methods of printing, spraying, spin coating and the like.
Step S023: and forming an isolation structure on the first leveling layer, wherein the isolation structure encloses to form a plurality of accommodating spaces.
Wherein at least a portion of the receiving space 211 is disposed corresponding to the curved filter 410.
Step S024: a light conversion unit is disposed within at least a portion of the receiving space to form a color conversion assembly.
At this time, in step S03, when the back plate assembly and the color conversion assembly are aligned and bonded to each other, the light shielding structure 120 and the isolation structure 210 are bonded to each other to form a relatively closed space, the light source 110 is disposed in the closed space, and the light conversion unit 220 is located in at least a portion of the closed space.
The setting manner of step S024 is various, and for example, step S024 further includes:
step S024 a: and forming a baffle in at least part of the accommodating space, wherein the baffle is provided with a light outlet hole which is arranged in a penetrating way.
Wherein, the baffle 300 and the curved filter 410 are correspondingly arranged.
Step S024 b: the light conversion unit is formed on a barrier to form a color conversion assembly.
Referring to fig. 8a to 8i, taking the display panel of fig. 6 as an example, the forming process of the display panel is briefly described as follows:
in a first step, as shown in FIG. 8a, a backplane assembly is provided. The back plate assembly includes a driving back plate 100, a plurality of light sources 110 distributed on the driving back plate 100, and a light shielding structure 120 surrounding the light sources 110.
In a second step, as shown in fig. 8b, a cover plate 800 is provided. The cover plate 800 is typically a glass cover plate 800, which has good stiffness and provides good protection.
Third, as shown in fig. 8c, a mold layer 700 is formed on the cover plate 800. In order to ensure the light transmission effect, it is preferable that the mold layer 700 is made of a transparent material.
In a fourth step, as shown in fig. 8d, a recess 710 is formed on the mold layer 700. May be formed by etching or the like.
In a fifth step, as shown in fig. 8e, the filter layer 400 is formed on the mold layer 700. Wherein the curved filter 410 is formed on the filter layer 400 at the position of the concave portion 710.
A sixth step, as shown in fig. 8f, forms a planarization layer 600 on the filter layer 400. The planarization layer 600 may be made of the same material as or different from the mold layer 700. In order to ensure the light transmission effect, it is preferable that the planarization layer 600 is also made of a transparent material.
In the seventh step, as shown in fig. 8g, an isolation structure 210 is formed on the planarization layer 600, and the isolation structure 210 encloses to form a receiving space 211. The isolation structures 210 may be formed on the planarization layer 600 using evaporation or other patterning processes.
Eighth, as shown in fig. 8h, the barrier 300 is formed on the planarization layer 600 of the accommodating space 211. The baffle 300 has a light exit hole 310 therethrough.
Ninth, as shown in fig. 8i, a light conversion unit 220 is formed on the barrier 300 to form a color conversion assembly.
And step ten, aligning and attaching the back plate assembly and the color conversion assembly, and bonding the back plate assembly and the color conversion assembly together by using bonding glue and the like to form the display panel shown in fig. 6.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (12)

1. A color conversion assembly comprising:
the color conversion layer comprises an isolation structure, a plurality of accommodating spaces formed by enclosing the isolation structure, openings communicated with the accommodating spaces, and light conversion units arranged at least part of the openings in the accommodating spaces;
and the Bragg filter layer comprises a curved filter corresponding to the light conversion unit, and the curved filter is bent along the direction far away from the light conversion unit.
2. The color conversion assembly of claim 1, further comprising a baffle disposed in the opening corresponding to the light conversion unit and connected to the isolation structure, wherein the baffle has a light exit hole formed therethrough, so that the emergent light passing through the light conversion unit exits through the light exit hole.
3. The color conversion assembly of claim 2, wherein a projection of the curved filter in a thickness direction of the bragg filter layer is curved.
4. The color conversion assembly of claim 3, wherein the curved filter is at least a portion of a hemisphere, and a center of the hemisphere in which the curved filter is located is within the exit aperture.
5. The color conversion assembly of claim 3, wherein the curved filter is hemispherical.
6. The color conversion assembly of claim 3, wherein the curved filter is part of a hemisphere, and the curved filter and the baffle are spaced apart in a thickness direction of the color conversion assembly.
7. The color conversion assembly according to claim 6, wherein a light blocking structure is disposed between two adjacent light exit holes, and the light blocking structure is connected between the filter layer and the barrier or the isolation structure.
8. The color conversion assembly of claim 2,
the isolation structure comprises a reflective metal material and/or a light absorption material, or a reflective metal layer and/or a light resistance layer are arranged on the outer surface of the isolation structure;
and/or the baffle comprises a light reflecting metal material and/or a light absorbing material.
9. A display panel, comprising:
the driving back plate is distributed with a plurality of light sources;
the color conversion assembly of any of claims 1-8, said light source being disposed in correspondence with said receiving space.
10. The display panel according to claim 9,
the color conversion assembly further comprises a baffle plate, the baffle plate is arranged in the opening corresponding to the light conversion unit and connected to the isolation structure, and a light outlet hole is formed in the baffle plate in a penetrating manner so that emergent light passing through the light conversion unit can be emitted out through the light outlet hole;
the light source and the light emitting hole are arranged at intervals along the thickness direction of the display panel, and the projection of the light source on the driving back plate and the projection of the light emitting hole on the driving back plate are at least partially overlapped along the thickness direction.
11. A method of manufacturing a color conversion assembly, comprising:
providing a substrate, forming a model layer on the substrate, and forming a Bragg mirror filter layer in the model layer, wherein the filter layer comprises a plurality of curved surface filter lenses which are formed in a concave manner along the direction close to the substrate;
forming a first planarization layer on the molding layer;
forming an isolation structure on the first leveling layer, wherein the isolation structure encloses to form a plurality of accommodating spaces;
a light conversion unit is formed within at least a portion of the receiving space to form a color conversion assembly.
12. The method of claim 11, further comprising, prior to forming a light conversion unit within at least a portion of the receiving space:
forming a baffle in at least part of the accommodating space, wherein the baffle is provided with a light outlet hole which is arranged in a penetrating way;
forming the light conversion unit on the baffle to form the color conversion assembly.
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